Fastening-type pipe supporting apparatus for curved pipe

ABSTRACT

A fastening-type pipe supporting apparatus capable of supporting a curved pipe against loads acting on a curved portion of the pipe via clamps having curved surfaces and being easily attached to and detached from the curved portion of the pipe. The fastening-type pipe supporting apparatus includes: a first clamp having a semicircular cross-sectional shape and a curved surface with a curvature to surround the curved portion of a pipe; a second clamp having a semicircular cross-sectional shape and a curved surface with a curvature to surround the curved portion of the pipe, the second clamp being coupled to the first clamp; a connection bolt coupling the first clamp with the second clamp; and a washer placed around the connection bolt.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.10-2015-0190809, filed on Dec. 31, 2015, in the Korean IntellectualProperty Office, the disclosure of which is incorporated herein in itsentirety by reference.

BACKGROUND

1. Field

One or more example embodiments relate to an apparatus for supporting acurved portion of a pipe, more particularly, to a fastening-type pipesupporting apparatus capable of supporting a curved pipe against loadsacting on the curved portion of the pipe via clamps having curvedsurfaces and being easily attached to and detached from the curvedportion of the pipe.

2. Description of the Related Art

In general, pipes having various shapes are used in power plants andother industrial plants. The pipes may include typically straightportions and curved portions and various loads such as pipe weights,thermal expansion loads, vibration loads, earthquake loads, pipe breakloads, or impact loads may act thereon. Pipe supporting structures orapparatuses are used to prevent deformation or destruction of pipingsystems caused by such loads.

Pipe supporting structures or apparatuses may be broadly classified intoan attachment-type and a fastening-type. The attachment-type may includeparts such as lugs or stanchions directly connected to pipes by a methodsuch as welding, forging, or casting and the fastening-type may includesupporting parts connected to pipes using mechanical parts such asclamps, bolts, or pins.

For example, in the case of the attachment-type, an attachment part isdirectly welded to a pipe, and thus, the attachment part is notseparable from the pipe. Thus, when it is required to measure thethickness of a curved portion of a pipe so as to verify the amount ofinternal corrosion of the pipe, the attachment part welded to the curvedportion of the pipe makes it impossible to measure the thickness of thecurved portion of the pipe. In addition, the attachment-type has anegative effect on the structural integrity of pipes and requires anadditional local stress evaluation because of parts welded to pipes.Thus, the fastening-type is widely used. Compared to the attachment-typeapparatuses, the fastening-type pipe supporting apparatuses are easilyattached to and detached from pipes, and it is easy to installfastening-type pipe supporting apparatuses on pipes in the field.

Pipe supporting structures or apparatuses are installed on straightportions or curved portions of pipes so as to maintain pipe stressesless than an allowable stress in the process of pipe stress analysis. Ingeneral, pipe supporting structures or apparatuses configured to beinstalled on straight portions of pipes are of the attachment-type orthe fastening-type. Various fastening-type pipe supporting apparatusesfor straight portions of pipes have been developed. For example,straight portion clamps 10 a and 10 b shown in FIG. 1 are widely used.

However, the development of fastening-type pipe supporting apparatusesfor curved portions of pipes is not yet sufficient, and thus onlyattachment-type pipe supporting structures are used for curved portionsof pipes. Referring to FIG. 2, a lug 30 or a stanchion 40 is welded to acurved portion 20 of a pipe. As described above, however, such anattachment-type pipe supporting structure is practically not separablefrom a pipe after the attachment-type pipe supporting structure iswelded to the pipe, and thus, it is practically impossible to measurethe thickness of the curved portion of the pipe for verifying internalcorrosion at the curved portion of the pipe. In addition, suchattachment-type pipe supporting structures have a negative effect on thestructural integrity of pipes, and even more, an additional local stressevaluation is required because of parts welded to pipes.

Therefore, in general, pipe supporting structures or apparatuses areinstalled on straight portions of pipes except for the case in whichpipe supporting structures or apparatuses have to be vitally installedon curved portions of pipes to maintain pipe stresses less than anallowable stress. However, if pipe supporting structures or apparatusesare installed on only straight portions of pipes as described above, itis difficult to select optimal positions for supporting loads. Forexample, even though pipe stress analysis results show that the curvedportion of a pipe is the most effective positions for supporting loads,an additional pipe stress analysis has to be performed to select a pipesupporting structure or apparatus installed on the only straight portionof the pipe instead of the curved portion of the pipe. In addition,according to the results of the additional pipe stress analysis,additional supporting structures or apparatuses may be required. Thatis, because of limitations of the pipe supporting structures orapparatuses for curved portions of pipes, it is difficult to selectoptimal installation positions for pipe supporting structures orapparatuses.

SUMMARY

One or more example embodiments include a fastening-type pipe supportingapparatus capable of supporting a curved pipe against loads acting on acurved portion of the pipe via clamps having curved surfaces and beingeasily attached to and detached from the curved portion of the pipe.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

According to one or more embodiments, a fastening-type pipe supportingapparatus for a curved portion of a pipe includes: a first clamp havinga semicircular cross-sectional shape and a curved surface with acurvature to surround the curved portion of the pipe; a second clamphaving a semicircular cross-sectional shape and a curved surface with acurvature to surround the curved portion of the pipe, the second clampbeing coupled to the first clamp; a connection bolt coupling the firstclamp with the second clamp; and a washer placed around the connectionbolt.

A side of the washer may be curved with a curvature, and another side ofthe washer may be flat. The fastening-type pipe supporting apparatus mayfurther include a supporting part coupled to the connection bolt andsupporting the curved portion of the pipe.

The first clamp may include first connection portions protruding fromboth lateral ends of the first clamp and including a plurality of firstconnection holes; the second clamp may include second connectionportions protruding from both lateral ends of the second clamp andincluding a plurality of second connection holes; a plurality ofconnection bolts may be inserted into the first connection holes and thesecond connection holes; and a supporting part may be coupled to theconnection bolts.

A bracket including a plurality of holes may be provided on the curvedsurface of the first clamp or the curved surface of the second clamp,and a plurality of supporting parts may be coupled to the bracket.

The supporting part or the supporting parts may include at least one ofstruts, rods, springs, snubbers, dampers, or sway braces. At least oneof brackets, stanchions, lugs, shoes, or skirts may be provided on thecurved surface of the first clamp or the curved surface of the secondclamp so as to support the curved portion of the pipe.

The fastening-type pipe supporting apparatus may further include nutstightened on the connection bolts, wherein the washer may include firstwashers between ends of the connection bolts and the first connectionholes, and second washers between the nuts and the second connectionholes, wherein sides of the first and second washers may be curved witha curvature, and other sides of the first and second washers may beflat. A flat portion on the first clamp or the second clamp may beprovided, and the flat portion may have a uniform height along thecurved surface of the first clamp or the second clamp.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects will become apparent and more readilyappreciated from the following description of the embodiments, taken inconjunction with the accompanying drawings in which:

FIG. 1 is a view illustrating straight portion clamps of the relatedart;

FIG. 2 is a view illustrating attachment-type pipe supporting structuresused for curved portions of pipes in the related art;

FIG. 3 is a perspective view illustrating a fastening-type pipesupporting apparatus for a curved portion of a pipe according to anexample embodiment;

FIG. 4 is an enlarged view illustrating a portion of FIG. 3;

FIG. 5 is a view illustrating a state in which supporting parts areconnected to connection bolts of the fastening-type pipe supportingapparatus for the curved portion of a pipe according to an exampleembodiment;

FIG. 6 is a view illustrating a state in which supporting parts areconnected to the connection bolts and a bracket of the fastening-typepipe supporting apparatus according to an example embodiment;

FIG. 7 is a view illustrating a state in which a plurality of supportingparts are connected to the bracket of the fastening-type pipe supportingapparatus according to an example embodiment;

FIG. 8 is a view illustrating a state in which a stanchion is coupled tothe fastening-type pipe supporting apparatus according to an exampleembodiment;

FIG. 9 is a view illustrating a state in which a lug is coupled to thefastening-type pipe supporting apparatus according to an exampleembodiment;

FIG. 10A is a view illustrating flat portions of the fastening-type pipesupporting apparatus according to an example embodiment; and

FIG. 10B is a cross-sectional view taken along line A-A of FIG. 10A.

DETAILED DESCRIPTION

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings, wherein like referencenumerals refer to like elements throughout. In this regard, the presentexample embodiments may have different forms and should not be construedas being limited to the descriptions set forth herein. Accordingly, theexample embodiments are merely described below, by referring to thefigures, to explain aspects of the present description. As used herein,the term “and/or” includes any and all combinations of one or more ofthe associated listed items. Expressions such as “at least one of,” whenpreceding a list of elements, modify the entire list of elements and donot modify the individual elements of the list.

Example embodiments relate to a fastening-type pipe supporting apparatusconfigured to support a curved pipe against loads acting on the curvedportion of the pipe using clamps having curved surfaces and to be easilyattached to and detached from the curved portion of a pipe. Hereinafter,the embodiments will be described with reference to the accompanyingdrawings.

Referring to FIG. 3, according to an example embodiment, afastening-type pipe supporting apparatus 100 for a curved portion of apipe may include a first clamp 110, a second clamp 120, connection bolts130, and washers 140.

Each of the first clamp 110 and the second clamp 120 has a semicircularcross-sectional shape and a surface curved with a curvature to surrounda curved portion 190 of a pipe. The first clamp 110 and the second clamp120 are shaped according to the shape of the curved portion 190 suchthat the first clamp 110 and the second clamp 120 may surround thecurved portion 190. Since the first clamp 110 and the second clamp 120have a semicircular cross-sectional shape, a circular shape is formed byjoining the first clamp 110 with the second clamp 120, and the curvedportion 190 of the pipe may be placed in the circular shape.

The first clamp 110 and the second clamp 120 may be variously shapedaccording to the shape of the curved portion 190. According to anexample embodiment, the first clamp 110 and the second clamp 120 mayhave curved surfaces with given radii of curvature. That is,semicircular cross-sections of the first clamp 110 and the second clamp120 may extend along a curved shape having a certain radius ofcurvature. In this case, the radius of curvature of the first clamp 110may be greater than the radius of curvature of the second clamp 120.Thus, the first clamp 110 may be placed on an outer side of the curvedportion 190, and the second clamp 120 may be placed on an inner side ofthe curved portion 190.

However, the shapes of the first clamp 110 and the second clamp 120 arenot limited thereto. That is, the first clamp 110 and the second clamp120 may have various shapes. For example, the first clamp 110 and thesecond clamp 120 may have the same radius of curvature (in this case,the first clamp 110 and the second clamp 120 may cover lateral sides ofthe curved portion 190, respectively). Although the first clamp 110 andthe second clamp 120 are described in the current example embodiment, afirst clamp, a second clamp, and a third clamp may be also used in otherexample embodiments. However, since many clamps require many couplingparts, two clamps may be used.

The first clamp 110 and the second clamp 120 are coupled to each otherto support the curved portion 190. The first clamp 110 and the secondclamp 120 may be coupled to each other using the connection bolts 130.

That is, the connection bolts 130 may be used to couple the first andsecond clamps 110 and 120 together. The connection bolts 130 may haveany shape as long as the connection bolts 130 are capable of couplingthe first and second clamps 110 and 120 together.

According to an example embodiment, the first clamp 110 includes firstconnection portions 111 protruding from both lateral ends of the firstclamp 110 and having a plurality of first connection holes 112, and thesecond clamp 120 includes second connection portions 121 protruding fromboth lateral ends of the second clamp 120 and having a plurality ofsecond connection holes 122. The first and second connection portions111 and 121 may protrude from both lateral sides of semicircularcross-sections of the first and second clamps 110 and 120 and may extendalong the curved surfaces of the first and second clamps 110 and 120.

The first and second clamps 110 and 120 may be coupled to each other byinserting the connection bolts 130 into the first and second connectionholes 112 and 122 of the first and second connection portions 111 and121.

The washers 140 may be used to enhance the degree of coupling betweenthe first and second clamps 110 and 120. The washers 140 may be placedaround the connection bolts 130, and loads applied to the connectionbolts 130 may be transmitted to the first and second clamps 110 and 120through the washers 140.

The washers 140 may be in contact with the first and second connectionportions 111 and 121. Thus, sides of the washers 140 making contact withthe first and second connection portions 111 and 121 extending along thecurved surfaces of the first and second clamps 110 and 120 may be curvedwith a given curvature, and the other sides of the washers 140 may beflat. That is, the washers 140 may have sides shaped according to thecurved surfaces of the first and second clamps 110 and 120. Thus, thewashers 140 may be brought into contact with the first and secondconnection portions 111 and 121 without gaps therebetween, and the firstand second clamps 110 and 120 may be firmly coupled to each other usingthe connection bolts 130 and the washers 140.

Referring to FIG. 4, according to an example embodiment, thefastening-type pipe supporting apparatus 100 may further include nuts150. The nuts 150 may be tightened on the connection bolts 130. Thefirst and second clamps 110 and 120 may be firmly coupled to each otherby inserting the connection bolts 130 into the first and secondconnection holes 112 and 122 and tightening the nuts 150 on theconnection bolts 130.

A plurality of washers 140 may be used for each connection bolt 130. Forexample, two washers 140 may be used for each connection bolt 130. Thatis, two washers 140 may be placed around one connection bolt 130. Forexample, the washers 140 may include first washers 141 between ends ofthe connection bolts 130 and the first connection holes 112, and secondwashers 142 between the nuts 150 and the second connection holes 122.

Coupling positions of the first washers 141 and the second washers 142are as follows. The first washers 141 are placed around the connectionbolts 130, and then the connection bolts 130 are inserted into the firstand second connection holes 112 and 122. In the state in which theconnection bolts 130 are inserted in the first and second connectionholes 112 and 122, the second washers 142 are placed around theconnection bolts 130, and the nuts 150 are coupled to the connectionbolts 130.

Sides of the first and second washers 141 and 142 may be curved withgiven curvatures, and the other sides of the first and second washers141 and 142 may be flat. Referring to FIG. 4, since the first washers141 are placed between the connection bolts 130 and the first connectionholes 112, the first washers 141 may have concavely curved sides.However, since the second washers 142 are placed between the nuts 150and the second connection holes 122, the second washers 142 may haveconvexly curved sides.

Accordingly, the first and second washers 141 and 142 may be firmlycoupled to the connection bolts 130, the nuts 150, and the first andsecond connection holes 112 and 122 without gaps therebetween. Since theheads of the connection bolts 130 and the nuts 150 are flat, the othersides of the first and second washers 141 and 142 may be flat.

A coupling force may be transmitted from the connection bolts 130 andthe nuts 150 to the first clamp 110 and the second clamp 120 through thefirst washers 141 and the second washers 142, and thus the first andsecond clamps 110 and 120 may be firmly coupled to each other. Thewashers 140 enhancing the coupling strength between the first and secondclamps 110 and 120 may prevent the fastening-type pipe supportingapparatus 100 from sliding on the curved portion 190. If both sides ofthe first and second washers 141 and 142 are flat, gaps may be formedbetween the first washers 141 and the first connection holes 112 andbetween the second washers 142 and the second connection holes 122. Dueto such gaps, the washers 140 may be easily deformed by loads applied tothe fastening-type pipe supporting apparatus 100, and thus the couplingstrength between the first and second clamps 110 and 120 may be lowered.

According to an example embodiment, the fastening-type pipe supportingapparatus 100 may further include supporting parts 170 (refer to FIG. 5)configured to be coupled to the connection bolts 130 to support thecurved portion 190 of the pipe. The supporting parts 170 may transmitloads acting on the fastening-type pipe supporting apparatus 100 tofixed positions (such as positions of a structure capable of enduringthe load). For example, ends of the supporting parts 170 may beconnected to the fastening-type pipe supporting apparatus 100, and otherends of the supporting parts 170 may be connected to fixed positions.

According to an example embodiment, the supporting parts 170 may becoupled to the connection bolts 130 between the first and secondconnection holes 112 and 122. That is, ends of the connection bolts 130,the first washers 141, the first connection holes 112, the supportingparts 170, the second connection holes 122, the second washers 142, andthe nuts 150 may be sequentially arranged along the connection bolts130. Since the supporting parts 170 are placed between the first andsecond connection holes 112 and 122, the supporting parts 170 may beprevented from being separated from the fastening-type pipe supportingapparatus 100.

Referring to FIG. 5, the first and second connection holes 112 and 122are formed in the first and second connection portions 111 and 121. Thesupporting parts 170 may be coupled to the connection bolts 130 byinserting the connection bolts 130 into the first and second connectionholes 112 and 122. A plurality of supporting parts 170 may be installedin two or more directions to support the curved portion 190 in variousdirections.

One supporting part 170 may be connected to one connection bolt 130.However, this is a non-limiting example. For example, a plurality ofsupporting parts 170 may be connected to one connection bolt 130.

According to an embodiment, the fastening-type pipe supporting apparatus100 may further include a bracket 160 (refer to FIG. 6) provided on thecurved surface of the first clamp 110 or the curved surface of thesecond clamp 120. The bracket 160 may include protrusion parts 162extending from the curved surface of the first clamp 110 or the secondclamp 120, and holes 161 may be formed in the protrusion parts 162.

Referring to FIG. 6, one supporting part 170 may be coupled to thebracket 160. The position of the bracket 160 may be variously selectedaccording to the installation position of the supporting part 170. Thenumber of the protrusion parts 162 of the bracket 160 may be two ormore. The holes 161 are respectively formed in the protrusion parts 162,and an end of the supporting part 170 is coupled between the protrusionparts 162. For example, the bracket 160 and the supporting part 170 maybe coupled to each other using a pin or hinges. Any other structure maybe used to couple the bracket 160 and the supporting part 170 to eachother.

Referring to FIG. 7, a plurality of holes 161 may be formed in each ofthe protrusion parts 162 of the bracket 160. A plurality of supportingparts 170 may be coupled using the plurality of holes 161 in more thanat least one direction. In this manner, the curved portion 190 may besupported in more than at least one direction.

The supporting parts 170 may be respectively coupled to the connectionbolts 130 and the bracket 160 or may be coupled to only the connectionbolts 130 or the bracket 160 as necessary. Alternatively the supportingparts 170 may be coupled to simultaneously both the connection bolts 130and the bracket 160.

The supporting parts 170 may include at least one of struts, rods,springs, snubbers, dampers, or sway braces. The supporting parts 170 maybe constituted by only struts or by combinations of struts, rods,springs, snubbers, dampers or sway braces as necessary. Ends of thesupporting parts 170 may be coupled to the connection bolts 130 or thebracket 160, and other ends of the supporting parts 170 may be coupledto fixed positions to transmit loads acting on the curved portion 190 tothe fixed positions. The supporting parts 170 are not limited to struts,rods, springs, snubbers, dampers, or sway braces. That is, variousstructures or devices may be used as the supporting parts 170 totransmit loads acting on the curved portion 190. The structures ofstruts, rods, springs, snubbers, dampers, and sway braces arewell-known, and thus detailed descriptions thereof will not be presentedhere.

Referring to FIGS. 8 and 9, according to an embodiment, thefastening-type pipe supporting apparatus 100 may further include atleast one of a bracket 160, a stanchion 171, a lug 172, a shoe (notshown), or a skirt (not shown) on the curved surface of the first clamp110 or the curved surface of the second clamp 120. The bracket 160, thestanchion 171, the lug 172, the shoe (not shown), and the skirt (notshown) are attachment parts for supporting the curved portion 190 andmay be provided at various positions of the first clamp 110 or thesecond clamp 120 as necessary.

A plurality of brackets 160, a plurality of stanchions 171, a pluralityof lugs 172, a plurality of shoes (not shown), a plurality of skirts(not shown), or a combination thereof may be attached to the curvedportion 190 in more than at least one direction. Like the supportingparts 170, the stanchions 171, the shoes (not shown), and the skirts(not shown) may directly support loads acting on the curved portion 190.The brackets 160 and the lugs 172 may be welded to the first clamp 110or the second clamp 120, and the supporting parts 170 may be coupled tothe brackets 160 and the lugs 172.

In the related art, stanchions or lugs are directly welded to the curvedportion 190 of a pipe, thereby making it impossible to measure thethickness of the curved portion, decreasing the structural integrity ofthe pipe, and requiring an additional local stress evaluation for thepipe. According to the embodiment, however, the bracket 160, thestanchion 171, the lug 172, the shoe (not shown), or the skirt (notshown) is welded to the first clamp 110 or the second clamp 120, andthus the above-mentioned problems of the related art may be solved.

In addition, since the stanchion 171, the lug 172, the shoe (not shown),or the skirt (not shown) is welded to the first clamp 110 or the secondclamp 120, damage that may be caused by a heat-affected zone during athinwall pipe welding process may be prevented, and the damagepossibility of the pipe (the pressure retaining part) caused by adamaged pipe supporting apparatus may be eliminated, thereby improvingconsiderably the safety of a power plant.

FIG. 8 illustrates an attached stanchion 171, and FIG. 9 illustrates anattached lug 172. The bracket 160, the stanchion 171, the lug 172, theshoe (not shown), and the skirt (not shown) are well-known structures,and thus detailed descriptions thereof will not be presented here.

The fastening-type pipe supporting apparatus 100 may support a pipeusing only the first clamp 110 or the second clamp 120 without using thesupporting parts 170, the bracket 160, the stanchion 171, the lug 172,the shoe (not shown), or the skirt (not shown). To this end, a flatportion 180 having a uniform height along a curved surface may beprepared on the first clamp 110 or the second clamp 120.

The flat portion 180 may have a flat shape with a uniform height along acurved surface and may be used to place the curved portion 190 on afixed position (such as a position of a concrete structure) withoutinclining the curved portion 190. In this case, loads acting on thecurved portion 190 may be transmitted through the flat portion 180.

The position of the flat portion 180 may be variously selected.Referring to FIGS. 10A and 10B, flat portions 180 may be formed on boththe first and second connection portions 111 and 121. For example, loadsacting on the curved portion 190 may be supported by placing the flatportions 180 formed on the first and second connection portions 111 and121 on a flat concrete structure 181. The flat portions 180 may be usedtogether with the supporting parts 170, or only the flat portions 180may be used.

The curved portion 190 may be placed at various positions, and thus thelocations of the flat portions 180 are not limited to the first andsecond connection portions 111 and 121. That is, the flat portions 180may be variously formed according to the position of the curved portion190.

The fastening-type pipe supporting apparatus 100 according to theembodiments may have following effects.

The fastening-type pipe supporting apparatus 100 is configured tosupport the curved portion 190 of a pipe using clamps having curvedsurfaces and to be easily attached to and detached from the curvedportion. In addition, since the fastening-type pipe supporting apparatus100 includes the clamps having curved surfaces, the fastening-type pipesupporting apparatus 100 may provide the same conditions as afastening-type pipe supporting apparatus for a straight portion of apipe. That is, various pipe supporting apparatuses may be implemented.

Unlike pipe supporting apparatuses of the related art, thefastening-type pipe supporting apparatus 100 according to theembodiments does not require welding of an attachment part to the curvedportion of a pipe. Thus, the fastening-type pipe supporting apparatus100 may be easily installed on the curved portion of a pipe in thefield, and the thickness of the curved portion of the pipe may bemeasured. In addition, since the structural integrity of the pipe is notdecreased by the fastening-type pipe supporting apparatus, it is notnecessary to perform an additional local stress evaluation on the curvedportion of the pipe. Therefore, pipes may be designed, manufactured, andinstalled with lower costs.

In addition, according to the embodiments, since a bracket 160, astanchion 171, a lug 172, a shoe (not shown), or a skirt (not shown) isnot directly welded to the curved portion of a pipe but is welded to theclamps, damage that may be caused by a heat-affected zone during athinwall pipe welding process may be prevented, and the damagepossibility of the pipe (the pressure retaining part) caused by adamaged pipe supporting apparatus may be eliminated, thereby improvingconsiderably the safety of a power plant.

Furthermore, since the fastening-type pipe supporting apparatus 100 isusable for the curved portion of a pipe without limitations (in therelated art, only attachment-type pipe supporting structures are usedfor curved portions of pipes, and if possible, supporting apparatusesare installed on straight portions of pipes instead of curved portionsof the pipes), pipe supporting apparatuses may be installed at anoptimal position in the process of pipe stress analysis. That is, if thecurved portion of a pipe is found as an optimal pipe supporting positionaccording to pipe stress analysis, the curved portion of the pipe may beselected as the installation portion of the fastening-type pipesupporting apparatus 100 without limitations. Therefore, efficient pipestress analysis and optimized pipe design are possible. Thus, atime-consuming job for pipe stress analysis may be reduced, and fewerpipe supporting apparatuses may be installed at optimal installationpositions. That is, pipe installation and maintenance costs may bereduced.

The fastening-type pipe supporting apparatus 100 according to the one ormore of the above embodiments may be variously modified. Coupling partsor devices that may be used to join the first clamp 110 and the secondclamp 120 surrounding the curved portion 190 are not limited to theconnection bolts 130, the washers 140, and the nuts 150. That is,various coupling parts or devices may be used to joint the first andsecond clamps 110 and 120 together. For example, the first and secondclamps 110 and 120 may be coupled to each other using connection boltshaving curved sides and nuts having curved sides.

The curved portion 190 of a pipe encompasses various curved portions ofpipes such as a 90-degree elbow, a 45-degree elbow, and other bendingportions. In addition to supporting a curved portion 190 of a pipe, thefastening-type pipe supporting apparatus 100 of the embodiments may beused to support a pipe fitting such as a branch portion or a reducingportion by coupling the first clamp 110 and the second clamp 120 to eachother according to the fitting. Furthermore, the fastening-type pipesupporting apparatus 100 may be implemented using one or more additionalclamps in addition to the first clamp 110 and the second clamp 120. Thebranch portion may be a T-shaped portion, and the reducing portion maybe a portion of a pipe having an increasing or decreasing diameter.

As described above, according to the one or more of the above exampleembodiments, the fastening-type pipe supporting apparatus is configuredto support the curved portion of a pipe via clamps having curvedsurfaces and to be easily attached to and detached from the curvedportion of the pipe.

In addition, the fastening-type pipe supporting apparatus does notrequire welding an attachment part to the curved portion of a pipe.Thus, the fastening-type pipe supporting apparatus may be easilyinstalled on the curved portion of a pipe and the thickness of thecurved portion of the pipe may be measured. Since the structuralintegrity of the pipe is not decreased by the fastening-type pipesupporting apparatus, it is not necessary to perform an additional localstress evaluation on the curved portion of the pipe. Therefore, pipesmay be designed, manufactured, and installed with lower costs.

In addition, the fastening-type pipe supporting apparatus may beinstalled on the curved portion of a pipe without limitations. That is,pipe supporting apparatuses may be installed at an optimal position of apipe in the process of pipe stress analysis.

It should be understood that the example embodiments described hereinshould be considered in a descriptive sense only and not for purposes oflimitation. Descriptions of the features or aspects within each exampleembodiment should typically be considered as available for other similarfeatures or aspects in other example embodiments.

While one or more example embodiments have been described with referenceto the figures, it will be understood by those of ordinary skill in theart that various changes in form and details may be made therein withoutdeparting from the spirit and scope of the inventive concept as definedby the following claims.

What is claimed is:
 1. A fastening-type pipe supporting apparatus forsupporting a curved pipe against loads acting on a curved portion of thepipe, the fastening-type pipe supporting apparatus comprising: a firstclamp having a semicircular cross-sectional shape and a curved surfacewith a curvature to surround the curved portion of the pipe; a secondclamp having a semicircular cross-sectional shape and a curved surfacewith a curvature to surround the curved portion of the pipe, the secondclamp being coupled to the first clamp; a connection bolt coupling thefirst clamp with the second clamp; and a washer placed around theconnection bolt.
 2. The fastening-type pipe supporting apparatus ofclaim 1, wherein a side of the washer is curved with a curvature andanother side of the washer is flat.
 3. The fastening-type pipesupporting apparatus of claim 1, further comprising a supporting partcoupled to the connection bolt and supporting the curved portion of thepipe.
 4. The fastening-type pipe supporting apparatus of claim 1,wherein the first clamp comprises first connection portions protrudingfrom both lateral ends of the first clamp and comprising a plurality offirst connection holes, the second clamp comprises second connectionportions protruding from both lateral ends of the second clamp andcomprising a plurality of second connection holes, a plurality ofconnection bolts are inserted into the first connection holes and thesecond connection holes, and a supporting part is coupled to theconnection bolts.
 5. The fastening-type pipe supporting apparatus ofclaim 1, wherein a bracket comprising a plurality of holes is providedon the curved surface of the first clamp or the curved surface of thesecond clamp, and a plurality of supporting parts are coupled to thebracket.
 6. The fastening-type pipe supporting apparatus of claims 3,wherein the supporting part comprises at least one of struts, rods,springs, snubbers, dampers, or sway braces.
 7. The fastening-type pipesupporting apparatus of claims 4, wherein the supporting part comprisesat least one of struts, rods, springs, snubbers, dampers, or swaybraces.
 8. The fastening-type pipe supporting apparatus of claims 5,wherein the supporting parts comprise at least one of struts, rods,springs, snubbers, dampers, or sway braces.
 9. The fastening-type pipesupporting apparatus of claim 1, wherein at least one of brackets,stanchions, lugs, shoes, or skirts is provided on the curved surface ofthe first clamp or the curved surface of the second clamp so as tosupport the curved portion of the pipe.
 10. The fastening-type pipesupporting apparatus of claim 4, further comprising nuts tightened onthe connection bolts, wherein the washer comprises first washers betweenends of the connection bolts and the first connection holes and secondwashers between the nuts and the second connection holes, wherein sidesof the first and second washers are curved with a curvature, and othersides of the first and second washers are flat.
 11. The fastening-typepipe supporting apparatus of claim 1, wherein a flat portion is providedon the first clamp or the second clamp, the flat portion having auniform height along the curved surface of the first clamp or the secondclamp.